MQTT

Message Queuing Telemetry Transport (MQTT) is a light-weight, efficient publish-subscribe network protocol for sending messages between devices. This component enables publishing messages to an MQTT queue topic.

Protocol Specification

This component was built using the MQTT protocol specification.

Connections

MQTT Connection {#mqtt}

Authenticate requests to an MQTT server.

An MQTT broker connection requires a host, protocol, and optionally authentication credentials.

Prerequisites

• An MQTT broker instance accessible from the network (e.g., Mosquitto, HiveMQ, AWS IoT Core)
• Broker credentials if authentication is enabled

Configure the Connection

• Host: Enter the hostname or IP address of the MQTT broker
• Protocol: Select the connection protocol:
• TCP — standard unencrypted connection
• MQTT — MQTT protocol (typically port 1883)
• MQTTS — MQTT over TLS/SSL (typically port 8883)
• Port: Enter the broker port (optional - defaults depend on the selected protocol)
• Username: Enter the broker username (optional, required if authentication is enabled)
• Password: Enter the broker password (optional, required if authentication is enabled)

Input	Comments	Default
Host	Provide the string value for the host of the MQTT server.
Protocol	The protocol used to connect to the MQTT server.
Port	The port of the MQTT server.
Username
Password

Actions

Publish Message {#publish}

Publish a message to a MQTT topic.

Input	Comments	Default
Topic Name	Provide a string value for the name of the MQTT topic.
Message	Provide a string value to be sent to the MQTT topic.
Connection